DS6820PSMA - AC-DC Power Supply Module (230 VAC)

SPECIFICATIONS:

Part Number: DS6820PSMA
Manufacturer: General Electric
Series: Mark IV
Function: AC to DC Power Supply Module
Input Voltage: 230 V AC
Input Frequency: 50/60 Hz
Output Voltage: +24 V DC
Output Current Capacity: 10 A DC
Power Output Rating: 240 W
Ripple and Noise: < 50 mVp-p
Efficiency: > 85%
Isolation Voltage: > 1.5 kV
Technology: Surface mount
Operating temperature: -30 to +65°C
Size: 15.9 cm high x 17.8 cm
Weight: 2.27 kgs
Availability: In Stock
Country of Origin: USA

FUNCTIONAL DESCRIPTION:

DS6820PSMA is an AC-DC Power Supply Module (230 VAC) manufactured and designed by General Electric as part of the Mark IV Series used in GE Speedtronic Control Systems. It is designed to convert incoming 230V AC mains power into regulated DC outputs required by turbine control electronics. This module is optimized for industrial environments where stability, precision, and electrical noise immunity are critical. It supports continuous operation in mission-critical systems, such as gas and steam turbines, by ensuring a clean and protected power path for logic, I/O, and communication modules.

INSTALLATION:

The module fits into a designated slot in the PDM (Power Distribution Module) or system backplane and interfaces through edge connectors or dedicated power bus terminals. Electrical connections must comply with the system’s wiring and grounding specifications, using 10–12 AWG wire with appropriate insulation ratings. The module requires a 230V AC input supply and typically includes screw terminals or plug connectors for input line and neutral connections. Adequate heat dissipation and airflow should be maintained around the unit to prevent thermal shutdowns.

OPERATION:

It functions as a precision power conditioning and distribution unit, converting the input AC line voltage (nominal 230V AC) into tightly regulated DC voltages (commonly +24V DC and possibly other internal rails depending on configuration). The module includes internal filtering (LC/EMI filters), rectification, pulse-width modulation (PWM) switching, and feedback-stabilized regulation circuitry to maintain output voltage within strict tolerances under variable loads. It is designed to supply sufficient current (typically 10A or higher) to power I/O processors, control modules, relay drivers, and HMI components.

DIAGNOSTICS:

These indicators offer visual confirmation of module health and operational state. Internally, the power module features self-checking logic and fault isolation circuits that detect anomalies such as output undervoltage, overvoltage, thermal overload, and fuse failures. In the event of a fault, the module may shut down to prevent damage to downstream components. Diagnostic data may also be accessible via the system controller or through integration with the GE ToolboxST software, which allows for deeper system-level health checks, alarm logging, and remote status monitoring.

WOC has the largest stock of GE Speedtronic Control System Replacement Parts. We can also supply unused and rebuilt backup with a warranty. Our team of experts is available around the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on parts and repairs, kindly contact our team by phone or email.

FREQUENTLY ASKED QUESTIONS:

What type of input power is required for the module?

The module requires a single-phase 230V AC power input at 50/60 Hz. Input voltage should remain within ±10% of nominal to ensure proper operation and avoid triggering protective shutdowns.

What is the output voltage and current rating?

It delivers a regulated +24V DC output with a maximum current capacity of 10A. This is suitable for powering industrial control systems, relays, I/O modules, and logic circuits.

What are the typical output voltage options?

Standard output voltages include 3.3V, 5V, 12V, 15V, 24V, and 48V DC. Custom output voltages may be available depending on the manufacturer.